I think the railcar equivalent will eventually become reality (if it isn't already)

Lots of people tool around in giant class-a motorhomes. They are 40 or 45 feet long. They are basically small apartments with double-door fridges, dishwasher, washer/dryer, starlink, etc

if they add the self-driving stuff, it will make them extra popular.

I think mobileye might have something.

I wonder if there’s a market for “flatbed car with an RV strapped on top” like some type of auto train.